Bryant Geothermal Heat Pump Systems
50YEW
3
Residential Products Technical Guide
50YEW Water-To-Water Design Features
The 50YEW series is unlike any other water-to-water heat pump on
the market today. The large operating map of the scroll compressor
allows high temperature operation, up to 145°F [63°C] leaving
load water temperature even at 32°F [0°C] entering source water
temperature. The combination of a coaxial (tube-in-tube) heat
exchanger for the source (ground loop) side and a brazed plate
heat exchanger for the load (heating/hot water) side provides very
high effi ciencies. Integral controls for hydronic heating and domestic
water heating avoid the need for external microprocessor-based
controls for outdoor temperature reset, warm weather shutdown,
staging and other controls.
The 50YEW has an extended range refrigeration circuit, capable of
ground loop (geothermal) applications as well as open loop (well
water) applications. Standard features and factory-installed options
are many. Unique application-specifi c controls make the 50YEW
series ideal for hydronic heating and domestic hot water generation.
The heating-only refrigeration circuit is optimized for high water
temperatures, heating effi ciencies, and capacities.
The dual level compressor isolation mounting system, insulated
compressor enclosure, and compressor discharge muffl er make
the 50YEW series one of the quietest water-to-water heat pumps
available. The attractive “Euro-style” cabinet allows the unit to fi t into
any decor.
Application Flexibility
• Capacities 10kW [32,600 Btuh].
• High temperature scroll compressor, up to 145°F [63°C] leaving
water temperature.
• Ultra high effi ciencies (4.2 COP at ground loop conditions; up to
5.5 COP at ground water conditions).
• Built-in programmable controller with Outdoor Temperature Reset
and Warm Weather Shutdown.
• Large, back-lit digital user interface.
• Rugged coaxial (tube-in-tube) “Source” heat exchanger (copper or
cupronickel).
• Close approach temperature brazed plate stainless steel “Load”
heat exchanger.
• Dual level compressor isolation, compressor enclosure, and
discharge muffl er for Ultra quiet operation.
• “Euro-style” cabinet for attractive look.
• Insulated cabinet with foil backed insulation for ease of cleaning.
• Flush-mount FPT fi ttings, secured to the cabinet (no backup
wrench required).
• TXV metering device.
• 12-point low voltage terminal strip for ease of installation.
• ETL safety listing.
• Wide variety of options including internally factory installed
Domestic Hot Water Mode, Load and Source side pumps with
expansion tanks, VSFP (variable speed fl oor pump connection)
Controls and Cupro-Nickel Source Heat Exchanger.
Service & Installation Advantages
• Hinged front access door and 3 removable panels for ease
of installation and service.
• Galvanized steel construction with protective powder coat paint
and hinged front access door.
• Bi-directional thermal expansion valve.
• Puron
®
HFC-410A zero ozone depletion refrigerant.
• Circuit breaker protected 75VA control transformer.
• High and low pressure service ports on refrigerant circuit.
• Accurate refrigerant sensing freeze protection.
Factory Quality & Certifi cations
• All units are built on our Integrated Process Control Assembly
System (IPCS). The IPCS is a unique state of the art manufacturing
system that is designed to assure quality of the highest standards of
any manufacturer in the water-source industry. Our IPCS system:
a. Verifi es that the correct components are being assembled.
b. Automatically performs special leak tests on all joints.
c. Conducts pressure tests.
d. Performs highly detailed run test unparalleled in the
HVAC industry.
e. Automatically disables packaging for a “failed” unit.
f. Creates computer database for future service analysis and
diagnostics from run test results.
• All units are water run-tested in all modes to insure effi ciency
and reliability.
• Heavy gauge galvanized steel cabinets are epoxy powder coated
for durable and long-lasting fi nish.
• All refrigerant brazing is done in a nitrogen atmosphere.
• All units are deep evacuated to less than 100 microns prior to
refrigerant charging.
• All joints are both helium and halogen leak tested to insure annual
leak rate of less than 1/4 ounce.
• Coaxial heat exchanger, refrigerant suction lines and all water
lines are fully insulated to eliminate condensation problems in low
temperature applications.
• Noise Reduction features include: dual level compressor isolation,
insulated compressor compartment, interior cabinet insulation
using 1/2” coated glass fi ber, and variable speed fan.
• Safety features include: high pressure and loss of charge to
protect the compressor, condensate overfl ow protection, freeze
protection sensors to safeguard the coaxial heat exchanger
and air coil, hot water high-limit and low compressor discharge
temperature switch provided to shut down the hot water
generator when conditions dictate. Fault lockout enables
emergency heat and prevents compressor operation until
thermostat or circuit breaker has been reset.
• 10-year limited warranty on major refrigerant circuit components,
Optional extended warranties available.
• AHRI/ASHRAE/ANSI/ISO 13256-2 certifi ed.
• NRTL & CSA listed.
• US EPA “Energy Star” compliant.
• ISO 9001:2000 Certifi ed.
Options & Accessories
• Full Condensing Hot Water Generation With Internal Secondary
Heat Exchanger and Potable Water Circulating Pump.
• Factory Installed “Load” and “Source” Pumps.
• Factory Installed Expansion Tanks.
• Cupro-Nickel Source Water Coil.
• Extended Labor Allowance and Service Warranty.
